If we had taken such effective measures much earlier, the river________so seriously now.
| A．is not polluted | B．would not be polluted |
| C．had not been polluted | D．would not have been polluted |
Was it _____ he was training in the field _____ he got hurt?
| A．that, when | B．where, that | C．that, where | D．when, that |
----______was it ______ they discovered the entrance to the underground palace?
----Totally by chance.
| A．How, that | B．What, that | C．When, when | D．Where, that |
I think it’s the driver rather than the passengers who______ for the accident.
| A．is to blame | B．are to blame | C．are to be blamed | D．should blame. |
--- The patient looks much better. _____is it that has made him _____he is today?
--- Perhaps the special medicine and his family’s patient care.
| A．What; that | B．That; that | C．What; what | D．What; which |
It was not what he said but the way he said it ______ made a great difference to me at last..
| A．what | B．that | C．before | D．when |