Our success was largel_______the good cooperation of all team members

The Intemet is widely used,which ______ the development of English. [ ]

Since you have made such good preparations,there _______ be any problem about passing the coming exam.

Once we have________some knowledge, things do not become more difficult, but comprehensible.

I’ve become good friends with several of the studentsin my school I met inthe English speech contest last year.