To prevent driving too long a time，we________ driving on the highway.
| A．took turns |
| B．took turn |
| C．made turns |
| D．made turn |
A fantastic idea occurred to him ________ he could use a plastic bottle, ________ cut off, as a container to grow young plants in.
| A．which; whose top | B．that; the top of which |
| C．that; with its top | D．whether; whose top |
2188 is a lucky number, ________ I suppose, that will bring us luck and fortune and will be loved by us all.
| A．it | B．one | C．which | D．that |
The price system is a complex network _______ the prices of all the products bought and sold in the economy as well as those of a great number of services.
| A．consisting of | B．consisted of | C．making up of | D．made up |
The film Harry Potter Ⅳ is _______ for children above 12 and adults, for it contains horror and violence.
| A．promised | B．meant | C．admitted | D．permitted |
A turning point of the continuously high housing price won’t appear suddenly because there must be a certain process ________ many factors lead to the change.
| A．which | B．what | C．where | D．that |