We should return the books to the library time．（ ）
| A． |
about |
B． |
on |
C． |
by |
D． |
for |
Hello! This is Kevin speaking． May I speak to Mr Cao？
Please _______． I'll put you through．（ ）
A．come onB．move onC．hold onD．try on
The article says that one's personality depends on his animal sign．
You _______ read it for fun， but don't believe in that．（ ）
A．canB．mustC．shouldn'tD．needn't
A robot served us dinner last night． Don't you think we are living in amazing times？
I can't agree more． The ______ makes our lives easier and happier．（ ）
A．informationB．technology
C．discoveryD．competition
They offered courses _________ students know the importance of protecting the Huanghe River．（ ）
A．helpB．helpedC．helpsD．to help
Compared with a 1﹣day weekend， a 2﹣day weekend is ____ as we may have enough time for our hobbies．（ ）
A．more pleasantB．less pleasant
C．the most pleasantD．the least pleasant