单选题 If we ____ carefully we’ll be able to afford the trip to Tibet.

单选题 Soil erosion was ____ by the planting of trees in these areas.

单选题 The results are entirely ____ our earlier research on the origin of a rare species of beetle.

单选题 Her elegant style ____ her ____ from other journalists.

单选题 At the meeting they denounced the director for his _____ speaking.

单选题 The two countries agreed to _____ bilateral talks the following week.

单选题 There were calls for her _______ from the board of the firm because of his mistakes which caused great losses to their business.

单选题 His lecture was ____ with photos taken during the expedition.