There are 51 students in Class Three, _____ failed in the test.
| A．all of which | B．all of them | C．none of whom | D．none of them |
Does the way you thought of ________ the water clean make any sense?
| A．making | B．to make | C．how to make | D．having made |
In order not to be disturbed, I spend three days _______ in my study.
| A．locking | B．locked | C．to lock | D．lock |
He tried to ________ in Japanese.
| A．understand himself | B．make himself understanding |
| C．make himself understood | D．make to understand |
They ‘ll have other meetings like this in the weeks ________.
| A．following | B．to follow | C．followed | D．will follow |
Not a single mistake _______ in the last test.
| A．she made | B．made she | C．did she make | D．she did make |