It’s difficult _____ your sound because thenoise is too high.

John agreed to the suggestion that his students _____ two weeks to prepare for the exam.

33When a student asks_________it is worth staying up doing their lessons, a teacher may find it difficult to answer

________ does she weigh now— Her ________ is 50kg．

She was fortunate ______ to star in the film which ______ in the remote mountainous village.