I spent the whole day repairing the motorbike. The work was ____ simple.

There is no doubt _______international cooperation is the key to dealing with cyber crime.

The man went to bed，and when he woke up，he found his shoes still on．

Look at the clock! It’s time ______ work.

Then moment _________ Mary will always rememberis _________ Mr. Black gave her a lot of valuable advice on how to improve herwriting.