—How did she get infected?
—She _______ the viruses without any protection．
| A．exposed to | B．had exposed to |
| C．was exposed to | D．been exposed to |
This is certainly thec ase,but____it is a mistake or not Idon’t know.
| A．if | B．even though | C．whether | D．that |
Villagers often say our village is no longer____it used to be.
| A．what | B．that | C．which | D．how |
There as on why Igave in is____if I didn’t.
| A．because she would be disappointed | B．that she would be disappointed |
| C．because she would have a disappointment | D．for she would be disappointed |
.No matter how fast we worked,____.
| A．we couldn’t catch up with them | B．and we couldn’t catch up with them |
| C．so we couldn’t catch up with them | D．but we couldn’t catch up with them |
.The teache rfound ____ difficult to decide____ he would take with him to attend the
conference.
| A．it;whom | B．himself;who | C．this;whom | D．that;who |