The engineer explained __ the new system would improve efficiency and reduce costs, making the overall operation more streamlined compared to the previous model.
A. why
B. that
C. unless it was tested thoroughly beforehand,
D. while he was designing the first prototype,

Random Topics:
another/the others/each other/one anotherPresent Simple and Present ContinuousShould and Shouldn'tLanguage Features: Reflective ArticleVerbals and GerundsTenses & PrepositionModals and ConditionalsSimple Present and Past Tensetake, make, doConjunctions, Prepositions and InterjectionsOther quiz:
Grammar › ViewAria is loved by everyone ________ she is a very sweet girl.
A. before
B. unless
C. but
D. until
E. because
Prepositions › View
Since he met his new girlfriend, Juan never seems to be ______ home.
A. On
B. In
C. At
The motorbike _________ to Paul for years before Tom __________ it last week.
A. was belonging – has bought
B. had belonged – bought
C. had been belonging – bought
D. belonged – had bought
Preposition › View
Identify the preposition(s):
———————-
After lunch we will go outside.
A. lunch
B. After
C. will go
D. outside
