___ you _____ the text yet ? Yes, we ____ it two hours ago.

______ you _____ the text yet? Yes, we ______ it two hours ago. A: Did... copy... did B: Have...copied...have C: Have... copied...did D: Did... copy...had

I have ______ gone over my lessons, but he hasn't ______. A: already,already B: already,yet C: yet,already D: yet,yet

3.____ you _____ the text yet ? Yes, we ____ it two hours ago. A: A. Did…copy…did B: B. Have…copied…have C: C. Have…copied…did D: D. Did …copy…had

Have you fed the dog yet?TO____________ fed yet?

【单选题】.—Have you cleaned your room_____? —Yes, I’ve_____cleaned it. A.already, already B.yet, yet C.yet, already A. already, already B. yet, yet C. yet, already

中国大学MOOC: Directions: Fill in the blank in the following sentence with an exact word from the text.Yet, very few people have the ability to create a ____ brand: the iPod.

中国大学MOOC:"Directions: Fill in the blank in the following sentence with an exact word from the text.Yet, very few people have the ability to create a ____ brand: the iPod.";

函数$f(x)=x+\sin x$的( )。 A: 上凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$ B: 上凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$ C: 上凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$ D: 上凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$

There is no cure for this disease______. A: so far B: not yet C: so long D: as yet