1. We heard the girl _____ over there just now.
A. sings B. singing C. to sing D. sang
2. Help _____ to some bananas, children.
A. you B. yourself C. yours D. yourselves
3. The doctors are trying their best to save the _____ boy.
A. dead B. dying C. died D. diing
4. ---How many times _____you ______to Xi'an this year?
---Three times.
A. have; been
B. had; been
C. have; gone
D. had; gone
5. He likes to play _______the guitar ______the piano.
A.not; or
B.not only; but also
C.both; or
D.either; and
【答案】
1. B 解析：感官动词用法，hear sb doing强调的是正在进行的状态，句末有Just now 可以看出本句要强调的是我们听到那个女孩正在唱歌。
2. D 解析：help oneself to sth表示汉语中自便的意思，经常在招呼客人的时候用，是固定用法，注意后面提到children，应该用复数yourselves。
3. B 解析：dying是形容词，意思是将死的，奄奄一息的。
4. A 解析：本题考查两点，1，句末有this year不需要用过去时态，BD排除。2，has been to和has gone to的区别。Has been to表示去过了，现在也回来了。Has gone to表示已经去了，说话的时候还没回来。
5. B 解析：本题中只有B是正确的搭配