No one can imagine the difficulty he had _______ his son to get rid of the habit of playing computer games.
| A．persuading | B．to persuade | C．persuaded | D．persuade |
You were out enjoying yourself when you ________.
| A．must have studied | B．would have studied |
| C．should be studying | D．ought to have been studying |
. She is a caring and helpful neighbor, all of us will always adore and be thankful to.
| A．/ | B．that | C．for whom | D．one whom |
-- Why bother? There is too much rubbish here. You’ll never pick it all up.
--- Maybe not. But at least this part of the park cleaner.
| A．was | B．will be | C．had been | D．is |
He told us sadly that more than one person in the case.
| A．involved | B．had involved | C．was involved | D．were involved |
In fact, the situation was so desperate that, , no one could help another.
| A．in this way | B．in common | C．in other words | D．in most cases |