sometimes we do our exercises 【】是填on pair,on pairs.in pair,i

sometimes we do our exercises 【】是填on pair,on pairs.in pair,i sometimes we do our exercises 【】 In a shop I ( )a pair of shoes on.( )内填 buy try need 那个? This is a pair of shoes .can i try ____ on 是填it 还是 them 句子怎么填?We have P.E.on Turesday,So I want a new pair of s_____ our teacher tell you to work in ____(pair).pairs 请讲一下这个词的用法 be 动词填空There __two pairs of jeans on the bed.the new pair of I saw there__a pair of jeans on the bed when I came in.A.was may i try on this pair of jeans(同义句)----may i____this pair o We do morning exercises in the morning 把in改成on 可以么 I need another pair to try on.(同义) 用所给词组的适当形式填空：a pair of ,in the middle of ,in front of ,do on