They ________ the trucks with boxes of food and sent the goods to the disaster areas in Sichuan province.[ ]

It wfind his rootin Africa ____ made him decide to go to Zambia.

guess we ‘ve already talked about this before but I’ll ask you again just _____.

You don’t know how difficult the job is, you have done it yourself.

In my opinion, hard work is as important as, ______ an efficient way in study. [ ]