You can’t imagine what great trouble they have _____ the problem _____.
Washing hands frequently is one of the effective ways to avoid ________ by diseases.
The plane is ________ to arrive at 8 p.m.,but the foggy weather makes it hard to say.
It took Susan weeks to regain her ________ after a bad ________.
Don’t be ________ by products promising to make you lose weight quickly.
The girl ________to figure out the boy’s attitude towards her but without success.