It’s disappointing that no one could _________ a good idea to help us out of trouble．

She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.

Your book, Tommy——No, Mom, it’s my friend’s.——Remember to return it to _ __ name is on it.

________, it began to rain unexpectedly.

ought he couldn’t go to the party becausehe had too much homework, but persuaded by his friends, he went _________.