California ________ in the United Kingdom. It ________ in the US. A. is not / is B. has not been / is C. will not be / will be D. was not / has been6/100California ________ in the United Kingdom. It ________ in the US. is not / ishas not been / is will not be / will bewas not / has beenGiải thíchChọn đáp án A