Sweet wormwood（青蒿）is a common plant in China and Tu Youyou is the woman _________used the special power of the plant to save __________lives．（ ）
| A． |
which， millions of |
B． |
who， millions of |
| C． |
whose， million of |
D． |
who， million of |
—Let's go to the museum this weekend.
—_________ I have to prepare for the speech competition.（ ）
A．Yes，please.B．With pleasure.
C．Go ahead.D．What a pity!
—Are you confident about the football match against Class 11，Kunkun？
—________ I've got everything ready!（ ）
A．Of course not.B．It's hard to say.
C．Sure，I am.D．Just so﹣so.
This is the first birthday gift _________ I received.I've kept it many years.（ ）
A．whichB．thatC．whoD．what
—What did the teacher say just now？
—He asked me _________.（ ）
A．how could I work it out
B．when did I go to the library
C．why I looked unhappy then
D．who I am waiting for
—Do you know Mount Wudang in Shiyan？
—Yes，I _________ it twice.It's fantastic.（ ）
A．had climbedB．climb
C．climbedD．have climbed