___ delicious, some western foods are very inviting but not good for children’s health.

(2013·吉林长春高中毕业班第一次调研)As the immune system weakens, it loses the ability ________ illnesses.

—Have all the mysteries been cleared up?—Almost.But ________ only one question ________.(2012·黑龙江哈三中月考)

______ the project in time, the staff were working at weekends.

I was lying in bed last night when I felt the house______. Then everything became silent.