He made another wonderful discovery, _____ of great importance to science．
| A．which I think is | B．which I think it is |
| C．which I think it | D．I think is |
The earthquake in Yushu _______ roughly one month before the second anniversary of the earthquake in Wenchuan.
| A．was happened | B．had happened |
| C．happened | D．had been happened |
We need to “spread a little happiness”, _______ the song goes．
| A．which | B．that | C．as | D．what |
If the day _______ wet, we may have to change our plans．
| A．comes out | B．sets out | C．brings out | D．turns out |
It is the first time that a developing country _______ the Expo, described as the Olympic Games of economy, science and technology．
| A．is hosting | B．has hosted | C．hosts | D．will host |
The doctor said it would take six weeks to recover and I ________ be fine by then.
| A．may | B．will | C．should | D．can |