Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don’t use a nest.
| A．why | B．how | C．unless | D．where |
American eat______________ as they actually need every day.
| A．twice as much protein | B．protein as much twice |
| C．twice protein as much | D．protein as twice much |
| A．as a result | B．as the result | C．as a result of which | D．as a result of |
-----Li Ping told me that he overslept this morning.
-----Oh, he rarely used to oversleep, ________?
| A．usedn’t he | B．was he | C．didn’t he | D．did he |
Is this the first time that you _____ here?
| A．visit | B．are visiting | C．had visited | D．have visited |
This is a new ______ to language teaching, which can stimulate students’ interest to learn the language.
| A．approach | B．means | C．method | D．way |