We want to rent a bus which can ________ 40 people for our trip to Beijing.
A.loadB.holdC.fillD.support在线课程B
解析：
句意：我们想租用一辆能容纳40人的公共汽车来满足我们的北京之旅。load--to put sth./sb. on or in...装载；使某事物（某人）负荷；；hold--to contain; have space for...容纳，包含；fill--to make or become full装满，填满；support--to bear the weight of承受（某物/某人）的重量。根据句意只有B合适。