The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
A.what |
B.which |
C.that |
D.though |
China is playing an important role in the world. That’s Laura has come to study Chinese.
A.because |
B.why |
C.how |
D.that |
Astronauts in a spaceship have to _______weightless conditions _______are quite different from ______are on the earth.
A.do with; which; those |
B.deal with; that; that |
C.solve; that; what |
D.face; which; these |
— Can you answer my question?
--Sorry, I____________ . Would you repeat that question?
A.hadn't listened |
B.haven't listened |
C.don't listen |
D.wasn't listening |
There was plenty of time. She ________ .
A.mustn't have hurried |
B.couldn't have hurried |
C.must not hurry |
D.needn't have hurried |
-----________ he be watching TV now?
------Yes, he ________ be watching TV now.
A.Must, can |
B.Can ,must |
C.Can, can |
D.May, must |