You know that widely reading helps ______ your knowledge so I can’t help _____ the housework every day.
| A．an large, doing | B．to rich, to do | C．add, to | D．add to, doing |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
When we were young, every evening my brother and I ______ stay at home waiting for our mother.
| A．would | B．might | C．should | D．could |
______ I’m well again, I can go on with my work.
| A．Even if | B．As though | C．Ever after | D．Now that |
The government has to close those small factories to prevent the water of the river ______.
| A．polluting | B．from polluting | C．being polluted | D．polluted |
We agreed to accept ___________ they thought was the best engineer.
| A．whatever | B．whomever | C．whichever | D．whoever |