【C20】A．turnsB．risksC．choicesD．efforts

Our company makes a special effort to establish good communication and cooperative rela

His noble example inspired the rest of us （) greater efforts.A、／B、withC、ofD、to

A potential factor affecting scientists in their efforts to control the overgrowth of worl

He failed_____ all his efforts.A.evenifB.althoughC. in spite of

He failed _____all his efforts.A. in spite ofB. even ifC. although

When the parents were at work, they ________ to look after the baby.A. took turnsB. won