99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項(xiàng)選擇題

We have received your letter of September 12，（）we are glad to know that you are interested in our electric heaters.

A.which
B.at which
C.from which
D.in which

你可能感興趣的試題

單項(xiàng)選擇題

We are（）to have your enquiry for Sewing Machines.

A.please
B.pleased
C.pleasure
D.in pleasure

單項(xiàng)選擇題

We have to point out that the postponement of the fulfilment of the contract（）caused us certain expenses.

A.had
B.have
C.has
D.having