— Is it my age ________the boss minds?
—I’m afraid so. He will consider ________ necessary to have an experienced assistant.
| A．which；it | B．that；it | C．which；that | D．that；that |
_______ is known to all, smoking is harm our health.
| A．As, for | B．As, to | C．It, for | D．It, to |
__surprised me most was ___ Mary spoke Chinese just like a native speaker.
| A．That, what | B．Which, that | C．What, that | D．That, that |
--- Would you mind my opening the window. It is too hot.
---- .
| A．No, please don’t | B．Yes, go ahead | C．Yes, please | D．No, go ahead |
---- People are in great need of this kind of food.
----Yes. It’s really a problem that how to _________ the needs of them.
A give B. gain C. satisfy D. produce
Along with the letter was his promise _________ he would visit me on this coming Christmas.
| A．which | B．that | C．what | D．whether |