We can go hiking next week ____ it rains heavily.

__________ it is expected that students come to university with the ability to take good care of themselves,this is not always the case.

Would you like me to help you with the homework—______________ . But I can manage it myself.

really Can Doris read through it in such a short time — She covered the English novel ______ it took me, still less a simple story

下列句子中，传统礼貌用语使用正确的一句是（ ）