试题详情

We are _______ at the rapid progress Mark has made in this semester.

Put the upper cam in the position that agrees with the mark you made at removal.

We are in the same ________ at this moment; we have no other choice but to help each other.

In the preface（ ）this book,we are given the reason why it has been republished. to

s are in progress, the controller may ask the pilot to “hold short of the ILS critical area”. This d