THEY ...ALREADY... A NEW BRIDGE. A. WRITE B. WRITER C....

4. - 30 BAI TRAC NGHIEM VOI KEYS FOR 9 P
30 BAI TRAC NGHIEM VOI KEYS FOR 9 P

4. They ...already... a new bridge.

A. write B. writer C. writor D. writing

A. did/build B. have/built C. were/built D. have been/built