If he ________ his legs in the last training, he ________ in the coming World Cup, which he has been longing to compete in．

A．hadn't hurt; would join

B．didn't hurt; would have joined

C．didn't hurt would join

D．hadn't hurt; would have joined．

If we had taken such effective measures much earlier, the river ________ so seriously now．

A．is not polluted

B．would not be polluted

C．had not been polluted

D．would not have been polluted

If it ________ tomorrow, the sports meet would be put off．

A．rain

B．rains

C．should rain

D．will rain

He ________ and was made to repeat it．

A．hasn't understood

B．hasn't been understood

C．didn't understand

D．wasn't understood

I know Mr Brown; we ________ to each other at an international conference．

A．are introduced

B．have been introduced

C．were introduced

D．had been introduced

I've finally finished my paper and it ________ me an entire month．

A．takes

B．took

C．was taken

D．had taken

Although it is a problem only in Britain at the moment, I think it ________ the rest of Europe soon．

A．affects

B．is affected

C．has affected

D．will affect

He ________ in a shower last night and was wet through．

A．caught

B．was caught

C．had caught

D．is caught

You ________ things about．Look, what a mess in your room!

A．throw

B．have always thrown

C．are always throwing

D．have always been throwing

Let's keep to the point or we ________ any decisions．

A．will never reach

B．have never reached

C．never reach

D．never reached