A railway station is no place for a child ________ alone at night.
| A．leave | B．leaving |
| C．to be leaving | D．to be left |
On snowy days, you have to drive very to avoid traffic accidents.
| A．cautiously | B．neatly | C．smoothly | D．properly |
—You may find the key to the maths problem on page 107.
—Ah, it’s so simple. I wonder why I ＿of that.
| A．hadn’t thought | B．haven’t thought |
| C．didn’t think | D．wasn’t thinking |
The long and tiring talk, filled with arguments and quarrels, ended in disorder, _________ no agreement at all.
| A．reaching | B．reached | C．to reach | D．being reached |
Many people in the city wonder _____the city officials have the information they need to solve the problem.
| A．that | B．whether | C．what | D．which |
So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.
| A．he has felt | B．has he felt | C．he did feel | D．did he feel |