—I’m sorry. I wasn’t helpful when you were in trouble. —Oh, ________. In fact, you did help me a lot.
---Do you still remember when we went to Chong qing? ----I can’t remember now but_____ sometime last summer?
The demand that the law on gun ownership _____ be changed ___ is very strong.
The increase of the number of the students makes the limited computers not ________ to each student.
He had just sent an email to his pal on the Internet ________ the system broke down.
While intelligent people can often ______ the complex, a fool is more likely to complicate the simple.