I met an old friend __________ on the train yesterday.[
| A．by chance | B．on purpose | C．in fact | D．in return |
The teacher told the student to go back ________ he sat.
| A．to where | B．to which | C．the place where | D．where |
--Did you watch the football match last night?
--No, there was something wrong with my TV and it couldn’t ________ any programs.
| A．send up | B．get up | C．pick up | D．take up |
The tower clock was ________ eleven when I was walking towards home.
| A．hitting | B．beating | C．striking | D．knocking |
A dark cloud is a ________ of thunderstorm.
| A．symbol | B．sign | C．mark | D．signal |
________ the Internet is bridging the distance between people, it may also be breaking some homes or will cause other family problems.
| A．When | B．While | C．If | D．As |