__Do you know when Britain________war on Germany during the Second World War?__In 1993，I suppose.[ ]

_________ the unwritten rule goes, study is good, but health comes first.

time our teacher arrives tomorrow,all the work_____,with which he will be satisfied.

Oh, my God! It’s just a sea of cars. How can you ______ your car? —That’s easy. Mine is colored differently from any other one.

It was with great joy the couple found their missing son after 18 years.