选择方框内合适的短语并用其正确形式填空。
be used to take possession of be likely to
set off in the style of be devoted to go through
用括号内所给单词的适当形式填空
（1）—Is Grace your aunt?
—Yes, ____ (her) is.
（2）Mike and Bob ____ (be) friends.
（3）His ____ (grandparent) are in Beijing.
（4）These are her ____ (sister).
（5）—Are ____ (this) your pencils?
—No. My pencils are not black.
填上适当的数．
① 2×4－____＝0
② ____＋3×2＝10
③ 2×2＋____＝7
④ 4×3＋____＝15
下列变化属于化学变化的是（ ）
These stones are in strange ____(形状).
