School started on a ______ cold day in February.[2010]A．severeB．bitterC．suchD．frozen

Starting air valves are held firmly on their seats by_______.A.cam rollers on the camshaft

School started on a_____cold day in February.（2010－69)A．severeB．bitterC．suchD．frozen

Come on, _______ up your sleeves and start work.A) pushB) turnC) rollD) fold

I was_____ my _____to school when I saw him.A. on, timeB. in, wayC. on, way

When George was a little boy in primary school, he often______to school on foot.A．goesB．we

Many students at the school _______ on a project