China has opened its _______Antarctic research base (南极科考站) – the Taishan Station.
| A．four | B．the four |
| C．fourth | D．the fourth |
______you practice， _________you will be at math．（ ）
| A． |
The more； the better |
| B． |
The more； the best |
| C． |
The most； the better |
| D． |
The most； the be |
Jack has learned more about teamwork（团队合作） _______ he joined the soccer team．（ ）
| A． |
until |
B． |
since |
C． |
while |
D． |
though |
_____ my friends _______ I like playing computer games because we think it wastes time．（ ）
| A． |
Both； and |
B． |
not only； but also |
| C． |
Either； or |
D． |
Neither； nor |
﹣﹣﹣_________do your parents come to visit you in the US， Tom？
﹣﹣﹣Once a year．（ ）
| A． |
How often |
B． |
How long |
C． |
How soon |
D． |
How far |
Please stop _________ and go out for a walk． Remember _________ warm clothes．（ ）
| A． |
to study； wearing |
B． |
studying； to wear |
| C． |
to study： to wear |
D． |
studying： wearing |