【C4】A．soB．muchC．tooD．enough

John was ______ tired that he went to bed immediately after dinner.A、soB、veryC、tooD、suc

【C10】A．stillB．alreadyC．tooD．yet

【35】A．eitherB．neitherC．tooD．nor

【C8】A．if onlyB．only whenC．only tooD．but only

【C2】A．eachB．alsoC．tooD．either

Teachers can hardly be______careful when they instruct a lesson.A．veryB．enoughC．tooD．so