The air ______ different gases _____ together.
| A．consist of, mixing | B．is made up of, mixed |
| C．consisting of, mixed | D．makes up, mixing |
China is still an agricultural country and peasants ________ most of the population.
| A．make up | B．take up | C．pick up | D．give up |
The foreigners paid a visit to the theme park, ________ with satisfaction.
| A．having left | B．to leave | C．leaving | D．left |
You’re sure to make rapid progress if your plan for study ________ ahead of time.
| A．is made | B．has made | C．will be made | D．is making |
--It’s reported that the new underground line has been completed.
--Yes, but it hasn’t been made clear ________ it’s to be opened to traffic on time as planned.
| A．that | B．when | C．what | D．whether |
________ a diary every day, and you’ll improve your writing.
| A．Keeping | B．To keep | C．Keep | D．If you keep |