He is _________ the missing paper.
A. searching
B.searching for
C. searching of
查看答案
I went over only _________.
A. say goodbye to him
B. to say goodbye to him
C. what to say goodbye to him
Nobody except Mr. Green and his children _______ abroad before.
A. has been to
B. have been to
C. has been
The plane left _______ Shanghai ________ a rainy morning.
A. for, on
B. . in, on
C. at , in
The students are used __________ a song at the ________ of the class.
A. to sing, begining
B. to singing, start
C. to sing, beginning
微信支付 
支付宝支付