Having __________ no-meat day would be a good way of encouraging ___________ low carbon life-style．

A．a; the         B．a; a           C．the; the           D．the; a

—Can you give some advice on what I said just now?

—Sorry．My mind______________．

A．is wandering                      B．was wandering

C．has wandered                        D．had wandered

Mr. Jones, a professor, ___________ for his excellent lectures, is popular with his students．

A．known              B．knowing        C．to be known          D．having known

Of the two cameras, I would prefer __________ one, which is very easy for me to carry．

A．a smaller          B．the smallest           C．a small            D．the smaller

When _________ comes to saving energy, big changes start with small steps, like turning off the lights．

A．that         B．this            C．it        D．one

—Flight MU257 ______________．I must be off now．

—Have a nice trip．

A．is being announced                              B．has announced 

C．was announcing                                D．had been announced

Since 1994, the glacier in Antarctica has lowered by as much as 90cm, ________sea level to rise．

A．having caused                                       B．causing

C．caused                                                     D．being caused

Not until the train pulled into the next station ______________ her suitcase gone．

A．Mary had found                              B．had Mary found

C．did Mary find                                D．Mary found

____________ the news, so far, has been good, there may be bad days ahead．

A．When          B．While         C．If        D．As

What the young man can’t ___________ is that his mum always treats him like a baby．

A．support        B．undertake      C．hold        D．bear