You look sleepy today—__________ not to miss the flight，I didn’t dare to close my eyes the whole night

om, why not attend my birthdayparty held last week－I amsorry, I had meant to, but I somethingunexpected.

Riding bikes has advantages __________ driving cars ________ many aspects

We all know that how wonderful you are. It is not necessary for you to __________.

Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody’s life