Over the past decades, the population in this country because of the rising birth rate, immigration and the declining death rate.
| A．has been increasing | B．have been increasing |
| C．had increased | D．have increased |
Autumn coming, the leaves have ________turned into brown color.
| A．frequently | B．gradually | C．exactly | D．regularly |
catch the first bus, he got up very early this morning.
| A．In order to | B．In order that | C．So as to | D．So that |
There was ______ time when everything to do with ______ nature could keep Anne spellbound.
| A．a; the | B．the; a | C．a; \ | D．the; the |
Put the books back they belong after you have finished them.
| A．where | B．to where | C．to which | D．to the place |
--- How long do you think it is he arrived here?
--- No more than half a year, I believe.
| A．when | B．that | C．before | D．since |