I would like to double check my progress so far on my assignment to make sure I'm on the right track.

1. Complétez les phrases suivantes:

A. Nous doutons que vous...
Answer:
Nous doutons que vous dites la vérité.

B. Je suis heureuse que nous...
Answer:
Je suis heureuse que nous sommes arrivés à un accord.

2. Combinez les phrases suivantes avec qui, que, où ou dont.

A. Il y a un agent immobilier. Vous avez besoin de cet agent immobilier.

Answer:
Il y a un agent immobilier don't vous avez besoin de cet agent immobilier.

B. Tu lis la brochure. Je t’ai donné cette brochure.

Answer:
Tu lis la brochure que je t'ai donné.

Subjunctive mood should be used when any of the following is involved in the situation:

- doubt,
- wish
- desire
- emotions

So that applies to 1A and 1B.
The present tense of the subjunctive mood for the two verbs are:
You can use the Bescherelle or Internet to look up the subjunctive mood of the verbs dire and être.

2A.
"dont" has been correctly used. However, since it replaces the real-estate agent mentioned earlier, there is no need to repeat "de cet agent immobilier".
For example,

Il offre ses services gratuitement.
Nous avons besoin de ses services.

can be shortened to

Il offre gratuitement ses services don't nous avons besoin.

2B
Hint:
what has been given: la brochure.
Concordance is needed for the past participle of "donner" according to what has been given.

To double check your progress on your assignment, let's review your answers:

1. Complétez les phrases suivantes:
A. Nous doutons que vous... (We doubt that you...)
Your answer: Nous doutons que vous dites la vérité. (We doubt that you are telling the truth.)
To check if your answer is correct, you can break down the sentence structure. "Nous doutons que" indicates doubt or uncertainty, followed by "vous dites la vérité" which means "you are telling the truth." So, your answer is correct!

B. Je suis heureuse que nous... (I am happy that we...)
Your answer: Je suis heureuse que nous sommes arrivés à un accord. (I am happy that we have reached an agreement.)
To check if your answer is correct, analyze the sentence structure. "Je suis heureuse que" expresses happiness or satisfaction, followed by "nous sommes arrivés à un accord" which means "we have reached an agreement." Your answer is correct!

2. Combinez les phrases suivantes avec qui, que, où, ou dont.
A. Il y a un agent immobilier. Vous avez besoin de cet agent immobilier. (There is a real estate agent. You need this real estate agent.)
Your answer: Il y a un agent immobilier dont vous avez besoin de cet agent immobilier. (There is a real estate agent whom you need this real estate agent.)
To check if your answer is correct, analyze the sentence structure. "Il y a un agent immobilier" means "there is a real estate agent." The phrase "dont vous avez besoin de cet agent immobilier" means "whom you need this real estate agent." However, the correct answer should be "dont vous avez besoin" which means "whom you need." Therefore, your answer is incorrect.

B. Tu lis la brochure. Je t’ai donné cette brochure. (You are reading the brochure. I gave you this brochure.)
Your answer: Tu lis la brochure que je t'ai donné. (You are reading the brochure that I gave you.)
To check if your answer is correct, analyze the sentence structure. "Tu lis la brochure" means "you are reading the brochure." The phrase "que je t'ai donné" means "that I gave you." Your answer is correct!

In summary, your answers for the first set of questions are correct. However, for the second set of questions, your answer for A is incorrect, while your answer for B is correct.