Scientists ____ on the site found many ancient tools, tombs and pottery, and made some important archaeological discoveries.

A. worked

B. working

C. to work

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

You can't blame an automaker for wanting to design a car that looks ____, even if it doesn't have what it takes under the hood.

A. fast

B. fastly

C. quick

An:"i taking a break from my gardening. there seems to be no end to the amount of work i have to do."

Be:"....."

A.I do,too.

B.Not at all  

C.I'm glad I'm not in your shoes

D. There's no doubt about that 

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions

It's ____ for us to submit the project on time as it's really difficult.

A. possible

B. simple

C. impossible