Mary really hard on his book and thinks he’ll have finished it by Friday.
| A．worked | B．has been working |
| C．had worked | D．has worked |
_______ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
--What did you get ______ your mother ______ Mother’s Day?
-- A beautiful card ______ “Thank you, Mum”.
| A．for, in, on | B．for, on, with |
| C．to, for, in | D．to, at, of |
--Who______ it be that is knocking at the door?
--It ______ be Father, but I’m not sure.
| A．can; may | B．can; must |
| C．must; can | D．may; must |
Judging from his______ expression, this problem must be quite ______.
| A．puzzling; puzzling | B．puzzled; puzzled |
| C．puzzling; puzzled | D．puzzled; puzzling |
Listen! Do you hear someone _____ for help?
| A．calling | B．call | C．to call | D．called |