______nature reserves _______us learn more about protecting animals.
| A．Studying ; help | B．Studies ; helps | C．To study; helping | D．Studying; helps |
Leo was late for class again. So he____ clean the classroom after school.
| A．made | B．made to | C．was made | D．was made to |
His wife advised him________ drinking, but he wouldn't.
| A．to give up | B．gives up | C．gave up | D．giving up |
That beautiful skirt is _____ cotton.
| A．made of | B．made into | C．made from | D．made up of |
— Why _____ most stars _____ in the daytime?
— Because the sun is too bright.
| A．can’t; see | B．can’t; be seen |
| C．weren’t; see | D．weren’t; seen |
— Students _____ be allowed to use mobile phones at school.
— I agree. Phones can bring troubles.
| A．shouldn’t | B．wouldn’t | C．might | D．need |