（题文）Little Jack has learned to do lots of things on his own , ______ he is only four years old.
A. if B. though C. for D. since
——Will you go to the picnic this Saturday?
——I'd like to,______ I'll have to help look after my baby sister.
A. but B. or C. and D. so
The speaker showed some ______ examples to make the science report easy to understand.
A. awful B. stupid
C. proper D. thick
——I wonder ______ Jane gets on so well with her classmates.
——Because she always cares much about others.
A. whether B. how C. when D. why
——May I watch TV, Dad?
——When your homework is finished, you ______
A. should B. can C. must D. need
Some animals can ___ the color around to protect themselves.
A. take on B. give up C. put away D. see off
