Problems with the diesel engine fuel injection pump are usually caused by（）
Camshafts are usually driven by timing gears or （）.
Air chambers are usually fitted to reciprocating pumps in order to （）.
Conditions for crossing a rough bar are usually best at （）.
Gale warnings are usually issued when winds of（）8-9 are expected．
Two main lubricating oil pumps are usual and are obligatory in （）.
To obtain maximum efficiency, two stage air compressors are usually （）.
In an English class we are usually concerned with casual listening.（）
Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.
Minor supporting ideas are usually( )?
Apartments are usually used in America, while ______ are usually used in UK.
Business appointments are usually very formal.
Cars ____ from abroad are usually more expensive.
OTC drugs are usually regulated by ________.
Services are usually provided to physical object. For example, medical services are provided to objects.
Which of the following graphs are usually used to compare proportions?
Our usual terms of payment are 30% ________ by T/T before production and the ______ against copy of B/L, or by L/C at sight.
Summaries and quotations are usually introduced by a reference verb.
Concert tickets usually are discrimination pricing. ( )
In the Decline Stage, the buyers usually are ( ).
New words are usually not accepted until they＿＿＿．
Campuses are usually accessible by public（).
Our usual terms of payment are（)L/C and we hope they will be satisfactory（) you. A. by,for B.
Official lending and investing are usually done by:
