The streets are all wet.It ___ during the night.
| A．must be raining | B．must have been rain | C．had to rain | D．must have rained |
My friend asked me to go for walk, but I don't think I've got energy.
A a; / B. the; the C. / ; the D. a; the
Only in this way _________ make progress in our English study.
| A．can we | B．we can | C．we are able to | D．can we be able to |
A cook will be immediately fired if he is found _________ in the kitchen.
| A．smoke | B．smoking | C．to smoke | D．smoked |
____by one of his fellow soldiers，the wounded man walked slowly across the field．
| A．Supporting | B．Supported | C．Support | D．Been supported． |
Jenny worked hard before the final examination，and it_______．She got an A．
A．showed off B．paid off C．put off D．took off