Lei Feng is always ready to help others when they are in trouble and he never ______ their request.
| A．turns up | B．turns over | C．turns in | D．turns down |
There are two other buttons on the cellphones as well, one of_______is”HELP”.
| A．which | B．these | C．them | D．that |
.Without any doubt, depression________can create a variety of negative health effect.
| A．ahead | B．partly | C．alone | D．along |
________passenger plane crashed near Gazvin, Iran and all 168 people on________board were killed.
| A．A; a | B．A; / | C．The; the | D．The; a |
--How often do you drop your English teacher a line?
---________. But usually once a week.
| A．As usual | B．It depends | C．Generally speaking | D．Have no idea |
Some English scientists are identifying problems ____ technology in the 21st century. If solved, the solutions could change the world.
| A．facing | B．faced | C．being faced | D．having faced |