1£®Some necessary equipment as well as food and clothes ________(be) sent to the disaster­hit area since the floods occurred.

2£®To be mentally healthy, you need to build________good relationship with each other.

3£®It is sleeping late in the morning that leads to ________(be) late for work.

4£®My mother doesn't want to find a job and would rather ________(stay) at home and be a housewife.

5£®Thanks ________the teacher's help, he has made great progress in English study.

6£®—What has made him upset recently?

—________(leave) alone to face the troublesome case.