第三节语法和词汇知识(共15小题;每小题1分,满分15分)11. —It looks heavy. Can I give you a hand?—__________.
______ at the door before you enter my room, please.
Our friendship _____ quickly over the weeks that followed.
—Have you heard about that fire in the market? — Yes, fortunately no one _____.
Many people have donated that type of blood; however, the blood bank needs _____.
_______ with care, one tin will last for six weeks.