He _______ to study harder in the future so that he could have more opportunities to find a better job.

If you have any problems during your study here,please do not _______ to call me for help

When you fill in the application form, please use your_______ address so that we can contact you easily later.

After working for twenty hours without any rest, the doctors were _______.

Asateacher,youshouldnot_______thestudentsfromaskingquestionsinclass.