He told us an interesting story about himself, _______________why he didn’t succeed that time.
| A．explain | B．to explain | C．explained | D．explaining |
．The plant is dead . I ________ it more water.
| A．will give | B．would have given | C．must give | D．should have given |
．The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |
He has ______ little education that he finds it impossible for him to equal ______ important a task.
| A．so ;such | B．such ; so | C．so ;so | D．such ; such |
．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 |
My friend showed me round the town, was very kind of him.
| A．which | B．that | C．where | D．it |