—You've been busy, haven't you? —_______
A.I was busy last week.
B.Yes, I've been working hard on my paper.
C.I will get busy with my English studies.
D.I'd like to get busy like our teachers.
Even people of great wisdom find it hard to settle a family quarrel. You’d better not get _ in the affairs of the couple.A.readyB.businessC.involvedD.busy
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How long() you() a member of the club?A.have,,joinedB.have,,beenC.has,,joinedD.has,,been
You never work late, ________ you?A.doB.don’tC.haven’tD.are
Where ________ you ________?A.are/beB.have/beC.is/beD.have/been
乳牙萌出的顺序为A．I→Ⅱ→Ⅳ→Ⅲ→VB．I→Ⅱ→Ⅲ→]V→VC．I→Ⅲ→Ⅱ→Ⅳ→VD．Ⅱ→I→Ⅲ→Ⅳ→VE．Ⅱ→I→Ⅳ→Ⅲ→V
— You’d better have more physical exercise.— _______A.I’d like that, but I can’t afford the time.B.That’s good.C.Really.D.Yes, I would.
下列哪种状态是正常的无线信道状态()A.I（Idle）B.O（Outofservice）C.B（Busy）
