He was down in the mouthbecause he missed his plane．（ ）
| A． |
unhappy |
B． |
happy |
C． |
glad |
D． |
relaxed |
Must I clean the room now？
No，you ________．You can do it later．（ ）
| A． |
needn't |
B． |
can't |
C． |
may not |
There's little ________ left at home．Go and buy some，dear．（ ）
| A． |
carrots |
B． |
potatoes |
C． |
rice |
How long can I keep this dictionary？
Two weeks．You must ________ it on time．（ ）
| A． |
collect |
B． |
call |
C． |
return |
The 31 stOlympic Games will take place ________ August，2016．（ ）
| A． |
in |
B． |
on |
C． |
at |
﹣Excuse me．Where is ________ school library？﹣This way，please．（ ）
| A． |
an |
B． |
the |
C． |
a |