The police said they would not give up looking into other possibilities ____they find out what happened.
| A．as | B．while | C．until | D．although |
Only when medical expenses are reducedaccess to proper medical treatment.
| A．poor people do have | B．poor people can have |
| C．can poor people have | D．do have poor people |
Now the Chinese eatas they actually need every day.
| A．twice as much protein | B．twice protein as much |
| C．protein as twice much | D．protein twice as much |
It was several yearsI finally realizedDavid had lied to me.
| A．when;that | B．that;when | C．before;that | D．until;why |
Though flu is adisease,it can cause death.
| A．regular | B．normal | C．usual | D．common |
A true friend is the one that is coming in the door whileelse is going out.
| A．somebody | B．no one | C．nobody | D．everyone |