They would not allow him _______ climbing Mount Everest.
—— Sorry, Professor Smith. I didn’t finish the assignment yesterday. —— Oh, you ________ have done it as yesterday was the deadline.
—— I would never trust him again. He let me down. —— ________.
John is the only one of the students in the class that never _______ a mistake even when it is pointed to him.
—— What do you suggest? —— My suggestion is that Andrew ________ abroad and he stay there until the project completes.
Mr. Li was out of touch last week. The police ________ for him since.