If penicillin _____________ available, many people ______________ from sickness.
Miss. Gao _______ in the library for three years. But now she is a teacher.
I'm sorry you've been waiting so long, but it'll still be some time _______ Sundance gets back.
-Have you been to Liuyang? -No, I'd like to, _______.
A new bridge _______ across the river in Changsha and it is expected to open next year. A. is built B is being built C. are built D. has been built
—Must we get everything ready before we go to the countryside this summer? —No, you _______.
—Must we get everything ready before we go to the countryside this summer?
—No, you _______.