The new method Mr．Wang has been devoted to _____ effective

Look out! You ______ now. Please don’t talk on the phone.

Some of the volunteers hope to continue ________ in the village after_______ some time with the villagers.

It_____we had stayed together for several weeks_____ I found we had a lot in common.

He felt ________ this morning in class because he didn’t fall ________ last night.