For areas that receive regular and plentiful rainfall, such detailed crop monitoring（监测）might not be useful or ;
| A．economy | B．economic | C．economical | D．economics |
—I'm sorry, but I don't quite follow you. Did you say you wanted to return on November 20?
—Sorry, I myself clear. We want to return on December 20.
| A．hadn't made | B．wouldn't make | C．don't make | D．haven't made |
The engineers are so busy that they have zero time for outdoor sports activities, _______they have the interest.
He did not regret saying what he did but felt that he _________ it differently.
| A．could express | B．would express |
| C．could have expressed | D．must have expressed |
The living room is clean and tidy, with a dining table already ________ for a meal to be cooked.
| A．laid | B．laying | C．to lay | D．being laid |
Dina, _______ for months to find a job as a waitress, finally took a position at a local advertising agency.
| A．struggling | B．struggled | C．having struggled | D．to struggle |