One reason why he succeeds is ______he is good at thinking in different ways.
| A．because | B．as | C．which | D．that |
Don’t be angry with him. He didn’t make the mistake _______.
| A．in turn | B．on purpose | C．by accident | D．in total |
Much attention should be paid _________people’s living conditions.
| A．in improving | B．to improve | C．improving | D．to improving |
You can eat food free in my restaurant ________ you like.
| A．whenever | B．wherever | C．whatever | D．however |
Hurry up, ________you’ll miss the bus.
| A．and | B．while | C．but | D．or |
—The light in the office is still on.
—Oh, I forgot_________________.
| A．turning it off | B．turn it off | C．to turn it off | D．having turned it off |