They ____ friends since they met three years ago.
A: became
B: has been
C: have become
D: have been
A: became
B: has been
C: have become
D: have been
举一反三
- He _______ a league member for three years A: is B: has been C: has become D: have become
- A lot of buildings ______ and the place ______ very noisy ever since we moved here. A: have been built; has become B: have been built; became C: were built; has become D: were built; became
- Her ____ has never been questioned since they met three years ago. A: simplicity B: sincerity C: singularity D: similarity
- — Do you know Betty very well ? — Yes , she and I friends since we met in Guangzhou last summer . A: have made B: have become C: have been D: have turned
- ________ in the company for three years, Kevin has become experienced in foreign trade. A: Having worked B: Have been working C: Have worked D: Worked