Jack stood _______ except that his lips moved slowly.
As students, we should devote ourselves _____ our study.
Seeing a _____ smile on his face, no one doubtsthat he will get through the driving test.
The first time he had a dinner with some high officials, he felt ____ uneasy.
Don't put your bicycle______ the window. The glass can be easily broken.
They met for the first time, but they talked happily as if they______ good friends for a long time.