问题
Evidence has been found through years of study _____ children’s early sleeping problems are likely to continue when they grow up.
A:why
B:how
C:that
D:whether
B:how
C:that
D:whether
正确答案是：
同类题型
Tom,______ his father, ______ playing football.
Don’t pick flowers in the garden next time, Bill.—-_______.
填入下面一段文字横线处的语句，最恰当的一句是与镍氢电池等可充电电池相比，锂电池具有充电时间短、储能容量大等优势，因此一经上市就吸引了电动汽车制造商的注意。 。此外，其造价也相对昂贵。
Nancy is not coming tonight.—But she _____!
Elizabeth has already achieved success_______ her wildest dreams