The hero said he didn’t think twice ____ diving into the freezing river to rescue that child.
| A．before | B．after | C．until | D．when |
What impresses me most is ______ he appears in front of others, he wears a sincere and charming smile．
A．which B．that C．where D that whenever
____ difficulties we meet, we can work them out.
| A．Whatever | B．However | C．Wherever | D．Whenever |
The meeting was expected to start at 9 o'clock but the manager didn't turn up ______ twenty minutes later.
| A．before | B．until | C．after | D．since |
She found her calculator ________ she lost it.
| A．where | B．when |
| C．in which | D．that |
The WTO cannot live up to its name _______ it does not include a country that is home to one fifth of mankind.
| A．as long as | B．while |
| C．if | D．even though |