1.I started play the oboe because [I've heard] it was a challenging instrument
(a) no change
(b) I'd have heard
(c)I've been hearing
(d) I'd heard
2. That was [four years ago and, I've] enjoyed learning to play
(f) no change
(g) four years ago, and I've
(h) four years ago; and I've
(j) four years ago. And I've
Please let us know what YOU THINK the answers are, and someone here will check your work.
1. The correct answer is (d) I'd heard.
To choose the correct verb tense, we need to consider the context and the sequence of events. The sentence is talking about starting to play the oboe. Since this action took place in the past, we need to use the past tense. Among the options, "I'd heard" is the only one in the past tense, indicating that you had heard about the oboe being a challenging instrument before you started playing it.
2. The correct answer is (g) four years ago, and I've.
The sentence is providing additional information about an event that happened four years ago. In this case, a comma (,) is needed to separate the time marker "four years ago" from the rest of the sentence. Among the options, option (g) correctly places a comma after "four years ago." Additionally, the connector "and" is appropriate to indicate the continuation of the sentence and express that you have enjoyed learning to play since that time.