The watches that they______a year ago were poor in quality. A: will produced B: had been produced C: had produced D: produced

Where are the silk products produced? The silk products are produced in __________.

The principal benefit of tariff protection goes to:（  ） A: Domestic consumers of the good produced B: Domestic producers of the good produced C: Foreign producers of the good produced D: Foreign consumers of the good produced

In the last few years thousands of films ______ all over the world. A: have produced B: have been produced C: are producing D: are being produced

Carbon dioxide ______ from burning fuels is the most common of the so-called greenhouse gases. A: producing B: having been produced C: to be produced D: produced

The OR operation can be produced with

Apple produced the iPhone ( ).

-- How much is the latest style of the watch?[br][/br] -- Sorry, I have no idea. But it and I' will know the price soon. A: has produced B: has been producing C: is produced D: is being produced

________ can be produced and marketed as a product.

A Cigarette end glowed in the darkness. A: produced light smoke B: caused a big fire C: produced soft<br/>light