Mum won't let Simon go out unless he promises to be back ______ 10 o'clock tonight．（ ）
A．tillB．beforeC．asD．since
Yang Jiang ________ be the boy's favorite writer．He has written a lot to praise her．（ ）
| A． |
can't |
B． |
mustn't |
C． |
must |
D． |
need |
I bought a big box ________ books for kids in poor areas．（ ）
| A． |
collects |
B． |
to collect |
C． |
collect |
D． |
collected |
﹣﹣﹣________ do you volunteer in Old People's Home？
﹣﹣﹣Once a week．We hope to help the old more．（ ）
| A． |
How soon |
B． |
How many |
C． |
How often |
D． |
How long |
In 2022，Beijing will host the Winter Olympics．________ my brother and I want to watch it．（ ）
| A． |
Neither |
B． |
All |
C． |
Either |
D． |
Both |
________ great news it is!We'll have a school trip next week．（ ）
| A． |
What a |
B． |
What |
C． |
How a |
D． |
How |