Only when he started to explain ________ the reason for this.
A. she realized
B. did she realize
C. had she realized
Go and get your umbrella. It is __________ you put it yesterday.
A. how B. where C. when
An earthquake happened in Yunnan ________ the evening of October 7, 2014.
A. on B. at C. in
—Would you please help me ________ when the train leaves this afternoon.
— OK, wait a moment please.
A. look out B. find out C. work out
I am looking forward to the new book, but it ________ yet.
A. didn’t arrive
B. doesn’t arrive
C. hasn’t arrived
How long can I ________ the book？
A. borrow B. lend C. keep
