问题
_ his return from America, he got down to hisresearch.
A:While
B:In
C:As
D:On
B:In
C:As
D:On
正确答案是：
同类题型
Stop_________! I have_______ to tell you.
sorry to have muchof your spare time — That’s OK, and Iam glad to help you
David is very __________ and he can always make the people aroundhim happy.
__, I believe, and you willfind Tom is very outgoing
There is a board by the road，which ________ “Parking________”！[ ]