By the end of last month，Jane _____ enough money for the poor sick boy．（ ）
| A． |
raised |
B． |
would raise |
| C． |
had raised |
D． |
has raised |
Do you want to be healthy？______．Smiling can help you stay healthy．（ ）
| A． |
Smile |
B． |
Smiling |
C． |
Smiles |
D． |
Smiled |
﹣I want to borrow the book，but I don't know how long it may ______．
﹣For two weeks．（ ）
| A． |
keep |
B． |
be borrowed |
C． |
borrow |
D． |
be kept |
I hope everyone can care about ______ the environment and stop ______ things．（ ）
| A． |
protecting； wasting |
B． |
protecting； to waste |
| C． |
protect； wasting |
D． |
protect； to waste |
﹣﹣George，how can you prove（证明）the earth is round？
﹣﹣I can't，sir．_______，I never said it was．（ ）
| A． |
Except |
B． |
Unless |
C． |
Besides |
D． |
Including |
Teachers always tell us to try to be _______ honest student today and _______ useful man tomorrow．（ ）
| A． |
a； an |
B． |
an； a |
C． |
an； an |
D． |
a； a |