单项选择题
Since most doctors are ______ about effectiveness of the new medicine, they seldom recommend it to their patients.
单项选择题 The senator agrees that his support of the action would ______ his chances for reelection.
单项选择题 The manufacturers hoped that the motor show would ______ their car sales.
单项选择题 It was all agreed that the first problem the new government would have to ______ was unemployment.
