Doctors advise us ________masks on such hazy days.
| A．wear | B．wearing |
| C．to wear | D．worn |
What are the students ________?
| A．talking | B．telling to |
| C．speaking to | D．saying |
—What’s your mother?
— __________________.
| A．She is a worker | B．She is nice |
| C．She is cooking supper | D．She works in a shop |
A _______ schoolboy, Li Lida, first tried to cross the Qiongzhou Channel in June,2000.
| A．12-year old | B．12-years-old |
| C．12-year-old | D．12 years old |
He went to the factory_______ check the progress of the work.
| A．so far as | B．in order to |
| C．by reason of | D．for the purpose 目的 |
The man had to work hard because he had a big______ to support.
| A．family | B．house | C．home | D．flat |