What’s the matter with you? You _____ so pale.
What’s the matter with you? You \_\_\_\__ so pale.
固定
I went to _____ Shanghai yesterday. On _____ train I met a famous pop star.
I went to \_\_\_\__ Shanghai yesterday. On \_\_\_\__ train I met a famous pop star.
Nobody believed that his excuse for being late was why his car broke down on his way to work.
Nobody believed that his excuse for being late was why his car broke down on his way to work.
We can see a lot of people doing morning exercises in the park even _____ a cold morning.
We can see a lot of people doing morning exercises in the park even \_\_\_\__ a cold morning.
两个分别带有电荷量－Q和＋3Q的相同金属小球（均可视为点电荷），固定在一定距离的两处，它们间库仑力的大小为F；若两小球相互接触后再分开，并将其固定距离变为原来的一半，则两球间库仑力的大小为____．
两个分别带有电荷量－Q和＋3Q的相同金属小球（均可视为点电荷），固定在一定距离的两处，它们间库仑力的大小为F；若两小球相互接触后再分开，并将其固定距离变为原来的一半，则两球间库仑力的大小为\_\_\_\_．
A child’s five year is important as far as learning is _____.
A child’s five year is important as far as learning is \_\_\_\__.
The man fell in love with her at first _____.
The man fell in love with her at first \_\_\_\__.