[单选] Everyone knows that China’s Bristles are of superior quality（）those from other countries.

（），we are airmailing you our latest quotation-sheet. A．As request。 B．At request。 C．As requested。 D．At requested。 We have received your letter of September 12，（）we are glad to know that you are interested in our electric heaters. which。 atwhich。 fromwhich。 inwhich。 We are（）to have your enquiry for Sewing Machines. please。 pleased。 pleasure。 in pleasure。 We will consider（）your terms of payment. accepted。 to accept。 accepting。 accept。 We（）the seminar sponsored by you in September last year. aware。 aware of。 are aware of。 are aware。 Everyone knows that China’s Bristles are of superior quality（）those from other countries.