[ Grammar & Vocabulary ]
Every month, scientists … new gadgets to help us with our daily life.
A. estimate
B. involve –
C. invent
D. experiment

Random Topics:
Adverb Clauses of TimePresent Perfect Negative and InterrogativeGrammar ClausesPresent Simple TensePast Simple vs Present SimpleDemonstrative PronounAction VerbIF CLAUSESimple Verb TensesFuture Simple TensesOther quiz:
Grammar › ViewVerb ending in -ing: Select the -ing form of a verb:
A. shine
B. shines
C. shining
D. shone
Clause › View
I must do whatever my doctor says to me.
A. Noun clause as subject
B. Noun clause as object
C. Noun clause as object of verb
D. Noun clause as object of preposition
