–The plane is due to take off at 7:50 from the airport.
–________ we fail to arrive there in time. –Try to take another flight then.
| A．What if | B．As if | C．Even if | D．Only if |
We have the list of items we want, which means that we know ______ what we want.
| A．finally | B．exactly |
| C．luckily | D．immediately |
It is said that sandstorms will become more________ as a result of global warming.
| A．frequent | B．fluent |
| C．gradual | D．ordinary |
The Sunday of May is Mother’s Day and a time to be _____________ to our mothers.
| A．concerned | B．kind |
| C．grateful | D．honest |
We have been trying hard to find out the ____________of the homeless man, but without luck, no one can tell who he is.
| A．identity | B．memory |
| C．accent | D．difference |
You can get to Hong Kong using different kinds of ________, by air, by sea or by land.
| A．travel | B．transport |
| C．schedule | D．journal |