"They didn’t take measures in time, otherwise the explosions ____．"some experts said．
| A．wouldn’t happen | B．didn’t happen |
| C．wouldn’t have happened | D．mustn’t have happened |
Some high officers were punished by law only because they were _______ what didn’t belong to them.
| A．possessing | B．possessed | C．in possession of | D．in the possession of |
He looks younger ______ his friend; in fact, he is three years senior _______ his friend.
| A．to; to | B．than; by | C．than; than | D．than; to |
They had just finished the work _______ there was another one waiting for them.
| A．while | B．when | C．as | D．since |
So far all cloned animals have suffered from some different serious disorders, ______ dying soon after birth.
| A．many of which | B．many of whom | C．many of them | D．many of that |
We have to give the users something new ________ what we’ve already offered, which is the only way to broaden the appeal of the website.
| A．regardless of | B．in addition to |
| C．in exchange for | D．according to |