________ you keep moving， you'll never reach the top of the mountain．（ ）
| A． |
If |
B． |
Although |
C． |
Unless |
_____exciting news it is! 3D﹣﹣printed houses will come out!（ ）
A．WhatB．What anC．HowD．How an
More and more foreigners come to visit the Great Wall．
That's true． It is the_____of China．（ ）
A．praiseB．prideC．effortD．courage
He didn't go to school， did he？
_____，though he had a stomachache．（ ）
A．No． he didn'tB．Yes． he didn't
C．Yes． he didD．No． he did
The beautiful lady with glasses over there looks like our English teacher．
It _____be her． She has gone abroad．（ ）
A．can'tB．may notC．mustn'tD．needn't
Do you know Hong Kong﹣Zhuhai﹣ Macao Bridge（港珠澳大桥）？
Yes． it is_____cross﹣sea bridge in the world．（ ）
A．the longerB．longest
C．the longestD．longer