Inthe1950sintheUSA,mostfamilieshadjustonephoneathome,andwirelessphones_____yet.
A: haven’tinvented
B: haven’tbeeninvented
C: hadn’tinvented
D: hadn’tbeeninvented
A: haven’tinvented
B: haven’tbeeninvented
C: hadn’tinvented
D: hadn’tbeeninvented
举一反三
- No wonder those roses are dying. They ________ any water for weeks. A: haven’t had B: haven’t C: hadn’t had D: hadn’t
- "Haven’t you been to London" "______ been there." A: Yes, I haven’t B: No, I haven’t C: No, I have D: Yes, I hadn’t
- 完形填空 A: haven't B: didn't C: shouldn't D: hadn't
- --- How are you planning to travel to Shanghai?<br/>---<br/>I ______ yet, but I ______ taking a train. A: didn’t decide; am considering B: haven’t decided; consider C: haven’t decided; am considering D: hadn’t decided; have considered
- I had to tell the truth,___________I? A: haven't B: hadn't C: didn't D: don't