Scientists are increasingly _____ that the earth is getting hotter because of carbon dioxide and other gases.
| A．convinced | B．confident | C．concerned | D．conscious |
Travelers_______________ that they should bring their ID cards with them.
| A．have reminded | B．are reminded |
| C．were reminding | D．had been reminded |
I don't skate now, but I___________ when I was a kid.
| A．used to | B．am used to it | C．sued | D．used to do |
—Our holiday cost a lot of money.
—Did it? Well ,that doesn't matter____________ you enjoyed yourselves.
| A．unless | B．in case | C．as far as | D．as long as |
We liked the oil painting better____________ we looked at it.
| A．as | B．while | C．the | D．the more |
— Show me your permit, please.
—Oh, it's not in my pocket. It
| A．might fall out | B．could fall out |
| C．should have fallen out | D．must have fallen out |