He watches TV twice ____ three times a day.

A. and    B. or    C. from   D. to

66. Look! The _______ (tourist)are taking photos in the mountain.

67. It ______(take) me 3 hours to read that interesting book 3 days ago.

68. In Canada, a small number of people are on foot, but in China, the number of people who walk to work _______(be) large.

69. He lives on the ________ (two) floor and he watches TV twice a week. 

70. Dave ________(invite) me to his party last night.

He watches TV twice ____ three times a day.

1. A.
   and
2. B.
   or
3. C.
   from
4. D.
   to