John was one of the top students in our class, but believe it or not, he_______ passed the English exam last term.(西安市)

We can’t walk there. _________, we must find a taxi.

I’m certain David’s told you his business trouble. ________, it’s no secret that he owes a lot of money to the bank..

.—Jenny, I've finished my summer school classes.—Well, Chinese is _______ difficult to learn, isn't it?—It seemed that _______ at first. But after a while it starts to get easier. I got an A in the exam.

In my view, biology is ______ chemistry, but a little easier than mathematics.