Some children prefer to eat sweet chocolate _____ it's not good for their health．（ ）
| A． |
because |
B． |
if |
C． |
when |
D． |
though |
What are you going to do this afternoon？
I will go to the supermarket and buy _____ umbrella for climbing the mountains．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
Must I hand in the report now， sir？
．You can hand it in tomorrow．（ ）
| A． |
Yes， you can |
B． |
Yes， you must |
| C． |
No， you needn't |
D． |
No， you mustn't |
____ you study， the better grades you will get．（ ）
| A． |
Hard |
B． |
Harder |
| C． |
The harder |
D． |
The hardest |
Helen sings every day ，it seems that she likes very much．（ ）
| A． |
sports |
B． |
music |
C． |
fruit |
D． |
vegetables |
you smile at others， they will smile back．（ ）
| A． |
If |
B． |
So |
C． |
Or |
D． |
Though |