If you go by ______train ,you can have quite a comfortable journey ,but make sure you get _____fast one.
| A．/, / | B．/, a | C．the, a | D．/,/ |
Today,_________ rapid transportation and communication , the whole world seems to be smaller.
| A．regardless of | B．in spite of | C．instead of | D．because of |
The government requested that all the people ___________ in any indoor public area.
| A．not to smoking | B．not smoke | C．not smoking | D．to not smoke |
Scientists study ___________ human brains work to make computer.
| A．when | B．how | C．that | D．whether |
A girl on the bus begin to sing a pop song and soon all the other students _________.
| A．majored in | B．joined in | C．came in | D．handed in |
---Why were you late for school today?
----It was ________ I help catch a thief on the bus.
| A．since | B．as | C．for | D．because |