The article suggests that when a person ______ under unusual stress he should be especially careful to have a well-balanced diet．（ ）

[单选题]The article suggests that______.A． our earth exists before the sunB． how space formedC． no one knows where the earth comes fromD． our earth used to be part of a high mountain on the sun

there is an expectation that when a person reaches adulthood, marriage should so

What should the person operating the bridge telegraph do when an engine order is

[多选题]When the forwarder packs the goods on behalf of the exporter， he should con

[多选题]When the forwarder packs the goods on behalf of the exporter， he should con

[单选题]When a speaker express his intention of speaking ,such as asking a person t

[单选题]When the teacher asks questions, he should do as the following EXCEPT______

[单选题]The writer suggests that pruning should be done in winter because______.A． the cut surface can heal more quicklyB． open wounds on the tree run the less risk of getting diseasedC． a gardener can do pruning more easilyD． the leaves can interfere

Why should we be careful of the word “be”?A. “Be” allows for the use of adjectiv

[单选题]B．e careful when you ________ the derrickA．operatingB．operatesC．operateD．operated