Listening attentively in class and reviewing in time _______ a sure way to improve your learning, and this is especially true _______ it comes to standard tests.

All of my teachers but the math teacher ______ he cheated in the exam.

A poet and artist ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.

Clearly, development aid together with food ______ the long-term solution to the problem of poverty.

I feel it is you rather than the girl who ______ for being late for the speech.