起飞期间，当起落架手柄放到“收上“位后，如何知道前轮舱门已经关上:

Students with _______ problems may apply for student loans.

Sometimes it is very difficult to _______ some of the English words. Even the native speaker can not help.

Carelessness made him fall in his job _______.

Some states in the United States _______ people to carry guns.

This boy was _______ for what he had done in the class.

Some lazy men would rather _______ than work.

What he said in the meeting _______ everybody present.

We can not _______ all the magazines together.

We won’t allow any foreign country to _______ in our internal affairs.

Professor Smith is also the _______ of the international program office. If you have any problem when you study here, you may go to him for help.