—What do you think Lucy will be _________ five years?
—I think she will be a doctor.
| A．after | B．in | C．for | D．at |
The rivers will become dirtier and dirtier _______ we take action to protect them.
| A．since | B．if | C．until | D．Unless |
--I’m a little hungry, Mum.
--There are some cakes on the plate. You can take _______.
| A．it | B．one | C．that | D．This |
--Would you like some tea, please?
--Yes, and I prefer tea _______ some sugar.
| A．to | B．for | C．with | D．From |
--The man in a black suit _______ be our youth worker.
-- I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.
| A．must; can’t | B．can; mustn’t | C．can; could | D．must; won’t |
To find ___ better job, she decided to learn ___ second foreign language.
| A．a; a | B．a; the | C．the; a | D．the; the |