— You must _________ your son．
— Oh, I see．He must make mistakes at school again．
| A．be angry with | B．be kind of |
| C．be strict with | D．be pleased with |
The family sent clothes to the homeless and made them ______ warm in winter．
| A．to feel | B．feels | C．feeling | D．feel |
A lot of trees ______ in the country every year．
| A．was cut down | B．cut down |
| C．are cut down | D．will cut down |
_____ he is only 4 years old，he is able to play the piano very well．
| A．if | B．although | C．unless | D．until |
Working hard ________ the key _________ success of everything．
| A．is,to | B．is,of | C．are,in | D．are,for |
We feel like ___________ the work as soon as possible．
| A．finish | B．to finish | C．finishing | D．finished |