—Can I use the telephone on the table, sir? —Under no circumstances _________ to use the telephone in the office for personal affairs.
__________ problems you have,you can always come to me for help.
Plants grow best__________it is warm and wet.
__________ you go,you should bear the motherland in mind.
_________,so he didn’t come to school last week.
In my opinion,his suggestion__________right or not,should be considered.