Too much time ________on computer games by most teenagers every day． And their parents are worried about their health and study．（ ）
A．spendsB．is spentC．has spentD．spending
Chen Wei isn't at school today ________ he is taking a robot competition in Shanghai．（ ）
| A． |
so |
B． |
because |
C． |
before |
D． |
if |
It was late．She opened the door ________ because she didn't want to wake up her grandma．（ ）
| A． |
angrily |
B． |
quietly |
C． |
loudly |
D． |
heavily |
Meimei is going to be an older sister．Her parents are planning to have their ________ child．（ ）
| A． |
one |
B． |
two |
C． |
first |
D． |
second |
Students do less homework now．Usually it ________ before 9 o'clock in the evening．（ ）
| A． |
finishes |
B． |
finished |
| C． |
is finished |
D． |
was finished |
Must we finish the work today？
________．We have something else to do tomorrow．（ ）
| A． |
Yes，we can |
B． |
No，we can't |
| C． |
Yes，we must |
D． |
No，we needn't |