羈一般现在时,一般过去式,现在进行时,一般将来时综合对比练习螇1. Well go on picnic if the weather _ fine this weekend.螁A. is B. was C. will be D. is going to be 膁2. Look! Someone _ in the next room .螆A. danced B. dancing C. is dancing D. has danced 袇3.Our teacher told us the sun _ bigger than the earth.膂A. is B. was C. are D. will be蕿4.Could you tell me where the post office _?蝿A. was B. is C. will be