The officials have expressed ________ over the safety of the mine workers trapped in the mine．
| A．appetite | B．wealth | C．reward | D．concern |
______ he is doing an operation on a patient; please don’t disturb him.
| A．Right away |
| B．Right now |
| C．In no time |
| D．At once |
There has to ______ a well-developed system that can give people a warning when a tsunami is ______ the way.
| A．have；in |
| B．be；in |
| C．have；on |
| D．be；on |
—I hear Johnson ______ in the middle school.
—What? I can’t imagine him ______ as a teacher.
| A．teach；to work |
| B．teaches；working |
| C．teaches；to work |
| D．teach；working |
He has passed the examination _____ his hard work.
| A．because |
| B．because of |
| C．thank to |
| D．as a result |
I don’t like the pattern of the trousers. _____, the colour doesn’t suit me.
| A．However |
| B．Instead |
| C．Besides |
| D．Another |