Once new difficulties _____ in our new job, we should learn to use our brain to deal with it.

Helen devoted herself ________toher research and became a top scientist in the field of applied physics

Those children are wild. I feel sorry for _____ has to be their baby-sitter.

Do you often shop online— Yes. I have spent over 10 thousand yuan on Taobao and Suning .

so sorry to have come late for themeeting.— It is not your fault. With __ rush-hourtraffic and __ heavy rain, it is no wonder you were late.