Sally was excited to meet Susan at the party last night．They _____ each other since they graduated from Oxford University in 2010．
| A．haven’t seen | B．hadn’t seen |
| C．didn’t see | D．don’t see |
He tried his best to solve the problem,________ difficult it was.
| A．however | B．no matter |
| C．whatever | 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 |