You may feel difficult to ________ enough air in Tibet.
A. take away B. take on C. take in D. take off
—________ is the population of your town?
—About sixty thousand.
A.How B.What C.How many D.How much
In the near future, there ____ self-driving cars in our city.
A.is B.was C.are D.will be
—Mr.Wang isn't at work today.
—________ I know，he has gone to London.
A.As old as B.As far as
C.As soon as D.As long as
—What did Linda do last weekend?
—She succeeded in ____ a model plane.
A.makes B.making C.made D.to make
Linda is __________of the three girls, but she is the tallest.
A. young B. younger C. youngest D. the youngest
