在公司的发票查询打印规范中，每月可为客户补打（）次话费发票。
A.1
B.2
C.3
参考答案：A
They would like _________ to the library. [ ]
A. to go
B. to going
C. going
D. go
It will be 2 years ______ we see each other again.
A．after
B．before
C．if
D．though
