He had travelled only seven miles across the Channel ___ his engine failed and he was forced to land on the sea.
| A．before | B．while | C．when | D．it |
It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
| A．that; while | B．what; while | C．that; as | D．what; as |
Many Internet users make _____ most of the half-price promotion and it is _____ good opportunity for online shopkeepers to get their names known.
| A．a; the | B．/; the | C．the; / | D．the; a |
—I have passed the job interview!
—________!
| A．Good for you | B．Good luck | C．Cheer up | D．Never mind |
________ we have got everything ready, let’s begin the debate.
| A．Before long | B．Rather than | C．Now that | D． Even if |
Look! Some workers are busy building a monument, one______the national hero
| A．in memory of | B．in favor of | C．in need of | D．in place of |